After they had left, the only evidence of the siege was a padlock they put on the front door.

A police spokesman said a woman was taken to hospital, where her condition was poorly but stable. "We are now seeking a 27-year-old male suspect in what we believe is an isolated incident," the spokesman added.

- Anyone with information can ring police on 0151-777 5364 or the free and anonymous Crimestoppers on 0800-555111.